Black & Decker VP143 VersaPak Gold Battery, 2-Pack VP143 includes two VP110 3.6-Volt VersaPak gold batteries Rechargeable, with a minimum life of 300 charge cycles No memory - battery maintains its full length of cycle Provides a minimum of 60-Percent longer run time over the standard silver battery B&D Customer service number: 1-800-544-6986 (Mon-Fri 8:00am - 5:00pm EST) B&D customer service website link: http://www.blackanddecker.com/Customer-Service.aspx